In Arch Linux some packages in AUR can’t get installed because the upstream software developer is blocking the cURL headers on his websites which leads to the above error message.

cURL is the download tool used by makepkg which yaourt relies on. Both are the Arch Linux package builder or a package manager helper respectively. If you were not looking for workarounds for makepkg skip next two sections.

Seperate downloads

One workaround is to download the PKGBUILD and the upstream software seperately. Finally run makepkg.